<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <button @click="isHot=!isHot">改变天气</button>
        <div>
            <h1>以下是天气情况</h1>
            <p v-if="isHot">今天天气贼热</p>
            <p v-else>今天太天气很冷</p>
            <!-- v-else的使用 必须紧邻这v-if 否则无法生效 -->
        </div>
    </div>
    <script>
        const vm = new Vue({
            el: '#app',
            data() {
                return {
                    isHot: false
                }
            }
        })
    </script>
</body>

</html>